Not the brand, but the job of fitting the belt (I quote from the post linked above)
“ This [the fitting of a new timing belt] is one job on the VVT Panda/500 1.2 where I'd recommend using a franchised dealer (or trusted fiat specialist), rather than an independent garage.”
“I'm struggling to think of any small car where the belt change procedure has caused so many folks to go wrong and get into difficulties”